Harry Truman actually said...
All Federal agencies, including but not limited to, the War Manpower Commission, the National Selective Service System, and the Department of Justice, are directed to cooperate with the Secretary of the Interior to the fullest extent possible in carrying out the purposes of this order
Context
Executive Order 9548—Authorizing the Secretary of the Interior to Take Possession of and to Operate Certain Coal Mines
05/02/1945